Brian Skiff alerted me to a story in the Tucson paper about sky brightness trends. The good news is that the trend is pretty much flat, thanks to government regulation. http://azstarnet.com/news/local/article_b1fb01f4-c064-5247-a9e9-48abdef02b75.html Tom -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.